AgriCalc Pro | Modern Fertilizer Calculator

Precision Fertilizer Calculator

Optimize your crop nutrition with our advanced calculation tool for perfect soil balance every time.

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Agriculture field

Fertilizer Calculator

Enter your soil test results and desired nutrient levels to calculate fertilizer requirements

Your Fertilizer Requirements

Nitrogen (N) Needed: 0 lbs
Phosphorus (P₂O₅) Needed: 0 lbs
Potassium (K₂O) Needed: 0 lbs
Total Fertilizer Needed: 0 lbs
Bags Needed (50lb bags): 0

Recommended Application

Enter your values and click calculate to get personalized fertilizer recommendations for your crops.

Why Choose Our Calculator

Precision agriculture tools for modern farmers

Accurate Calculations

Our algorithms ensure precise fertilizer recommendations based on your specific soil test results.

Mobile Friendly

Access the calculator from any device – perfect for field use on your smartphone or tablet.

Crop Specific

Get tailored recommendations based on the specific nutrient needs of your crops.

Save & Share

Download, print, or email your results for future reference or to share with your agronomist.

Cost Effective

Optimize your fertilizer use to reduce waste and maximize your return on investment.

Eco Friendly

Prevent over-application that can lead to nutrient runoff and environmental damage.

What Farmers Say

Trusted by agricultural professionals nationwide

“This calculator helped me reduce my fertilizer costs by 15% while maintaining excellent crop yields. The precision is unmatched!”

John Farmer

John Peterson

Corn & Soybean Farmer, Iowa

“As an organic farmer, getting the nutrient balance right is crucial. This tool takes the guesswork out of my fertilizer applications.”

Sarah Grower

Sarah Williams

Organic Vegetable Farm, California

“I recommend this calculator to all my clients. It’s become an essential tool in my agronomy consulting practice.”

Mike Consultant

Dr. Michael Chen

Agricultural Consultant, Texas

Ready to Optimize Your Fertilizer Use?

Join thousands of farmers who are already saving money and improving yields with our precision calculator.

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Page Title | AgriCalc Pro

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1. Introduction

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2. Data Collection

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grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; margin-top: 40px; } .testimonial-card { background-color: var(–gray-color); padding: 25px; border-radius: 10px; transition: all 0.3s ease; box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05); } .testimonial-card:hover { transform: translateY(-5px); box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1); } .testimonial-content { margin-bottom: 20px; font-style: italic; position: relative; } .testimonial-content:before { content: ‘”‘; font-size: 4rem; color: rgba(107, 60, 231, 0.1); position: absolute; top: -20px; left: -10px; line-height: 1; z-index: 0; } .testimonial-content p { position: relative; z-index: 1; } .testimonial-author { display: flex; align-items: center; } .testimonial-author img { width: 60px; height: 60px; border-radius: 50%; object-fit: cover; margin-right: 15px; border: 3px solid var(–primary-color); } .testimonial-author h4 { margin-bottom: 5px; font-size: 1.1rem; } .testimonial-author span { font-size: 0.9rem; color: var(–text-light); } /* CTA Section */ .cta-section { padding: 80px 0; background: linear-gradient(135deg, var(–primary-color), var(–secondary-color)); color: var(–light-color); text-align: center; } .cta-section h2 { color: var(–light-color); font-size: 2.2rem; margin-bottom: 20px; } .cta-section p { max-width: 700px; margin: 0 auto 30px; font-size: 1.2rem; opacity: 0.9; } /* Footer */ .footer { background-color: var(–secondary-color); color: var(–light-color); padding: 60px 0 0; } .footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 40px; margin-bottom: 40px; } .footer-col h3 { color: var(–light-color); margin-bottom: 20px; font-size: 1.3rem; position: relative; padding-bottom: 10px; } .footer-col h3:after { content: ”; position: absolute; bottom: 0; left: 0; width: 50px; height: 2px; background-color: var(–primary-color); } .footer-col p { opacity: 0.8; margin-bottom: 20px; } .footer-col ul { list-style: none; } .footer-col ul li { margin-bottom: 10px; } .footer-col ul li a { color: rgba(255, 255, 255, 0.8); transition: all 0.3s ease; } .footer-col ul li a:hover { color: var(–light-color); padding-left: 5px; } .contact-info li { display: flex; align-items: center; margin-bottom: 15px; } .contact-info i { margin-right: 10px; color: var(–primary-color); width: 20px; text-align: center; } .social-links { display: flex; gap: 15px; } .social-links a { display: flex; align-items: center; justify-content: center; width: 40px; height: 40px; background-color: rgba(255, 255, 255, 0.1); border-radius: 50%; color: var(–light-color); transition: all 0.3s ease; } .social-links a:hover { background-color: var(–primary-color); transform: translateY(-3px); } .footer-bottom { padding: 20px 0; border-top: 1px solid rgba(255, 255, 255, 0.1); display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; } .footer-bottom p { opacity: 0.7; font-size: 0.9rem; } .footer-links { display: flex; gap: 20px; } .footer-links a { color: rgba(255, 255, 255, 0.7); font-size: 0.9rem; transition: all 0.3s ease; } .footer-links a:hover { color: var(–light-color); } /* Responsive Styles */ @media (max-width: 992px) { .hero-content { padding-right: 0; margin-bottom: 40px; } .hero-image { transform: none; } .hero-image:hover { transform: none; } } @media (max-width: 768px) { .hamburger { display: flex; } .nav-links { position: fixed; top: 80px; left: -100%; width: 100%; height: calc(100vh – 80px); background-color: var(–light-color); flex-direction: column; align-items: center; padding: 40px 20px; transition: all 0.5s ease; } .nav-links.active { left: 0; } .nav-links a { margin: 15px 0; } .dropdown-content { position: static; box-shadow: none; display: none; width: 100%; padding: 10px 0 0 20px; } .dropdown:hover .dropdown-content { display: none; } .dropdown.active .dropdown-content { display: block; } .hero { padding: 120px 0 60px; } .hero-content h1 { font-size: 2.2rem; } .calculator-results { margin-top: 30px; } .save-results button { flex: 100%; } } @media (max-width: 576px) { .hero-content h1 { font-size: 1.8rem; } .hero-content p { font-size: 1rem; } .calculator-section h2, .features-section h2, .testimonials-section h2, .cta-section h2 { font-size: 1.8rem; } .footer-col { min-width: 100%; } .footer-bottom { flex-direction: column; text-align: center; gap: 15px; } .footer-links { justify-content: center; } } /* Animation Classes */ @keyframes fadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } } .fade-in-up { animation: fadeInUp 0.6s ease forwards; } .delay-1 { animation-delay: 0.2s; } .delay-2 { animation-delay: 0.4s; } .delay-3 { animation-delay: 0.6s; } /* Print Styles */ @media print { .navbar, .footer, .save-results { display: none; } body { background-color: white; color: black; font-size: 12pt; } .calculator-results { width: 100%; } .result-card, .recommendation-card { box-shadow: none; border: 1px solid #ddd; page-break-inside: avoid; } } document.addEventListener(‘DOMContentLoaded’, function() { // Mobile Navigation const hamburger = document.querySelector(‘.hamburger’); const navLinks = document.querySelector(‘.nav-links’); hamburger.addEventListener(‘click’, function() { this.classList.toggle(‘active’); navLinks.classList.toggle(‘active’); }); // Dropdown functionality for mobile const dropdowns = document.querySelectorAll(‘.dropdown’); dropdowns.forEach(dropdown => { const dropbtn = dropdown.querySelector(‘.dropbtn’); dropbtn.addEventListener(‘click’, function() { if (window.innerWidth <= 768) { dropdown.classList.toggle('active'); } }); }); // Close mobile menu when clicking on a link document.querySelectorAll('.nav-links a').forEach(link => { link.addEventListener(‘click’, function() { if (window.innerWidth <= 768) { hamburger.classList.remove('active'); navLinks.classList.remove('active'); } }); }); // Scroll effect for navbar window.addEventListener('scroll', function() { const navbar = document.querySelector('.navbar'); if (window.scrollY > 50) { navbar.classList.add(‘scrolled’); } else { navbar.classList.remove(‘scrolled’); } }); // Calculator functionality const calculatorForm = document.getElementById(‘calculate-btn’); const resetBtn = document.getElementById(‘reset-btn’); const fertilizerType = document.getElementById(‘fertilizer-type’); const customBlendGroup = document.getElementById(‘custom-blend-group’); // Show/hide custom blend inputs based on selection fertilizerType.addEventListener(‘change’, function() { if (this.value === ‘custom’) { customBlendGroup.style.display = ‘block’; } else { customBlendGroup.style.display = ‘none’; } }); // Calculate fertilizer needs calculatorForm.addEventListener(‘click’, function(e) { e.preventDefault(); calculateFertilizer(); }); // Reset form resetBtn.addEventListener(‘click’, function(e) { e.preventDefault(); document.querySelector(‘.calculator-form’).reset(); customBlendGroup.style.display = ‘none’; document.getElementById(‘results’).style.display = ‘none’; }); // Print results document.getElementById(‘print-btn’).addEventListener(‘click’, function() { window.print(); }); // Save as PDF (simulated) document.getElementById(‘save-btn’).addEventListener(‘click’, function() { alert(‘PDF download functionality would be implemented with a library like jsPDF in a production environment.’); // In a real implementation, we would use jsPDF or similar library // to generate and download a PDF of the results }); // Email results (simulated) document.getElementById(’email-btn’).addEventListener(‘click’, function() { alert(‘Email functionality would connect to a backend service or email API in a production environment.’); }); function calculateFertilizer() { // Get input values const area = parseFloat(document.getElementById(‘area’).value) || 0; const currentN = parseFloat(document.getElementById(‘current-n’).value) || 0; const desiredN = parseFloat(document.getElementById(‘desired-n’).value) || 0; const currentP = parseFloat(document.getElementById(‘current-p’).value) || 0; const desiredP = parseFloat(document.getElementById(‘desired-p’).value) || 0; const currentK = parseFloat(document.getElementById(‘current-k’).value) || 0; const desiredK = parseFloat(document.getElementById(‘desired-k’).value) || 0; // Calculate nutrient needs per acre const nNeeded = Math.max(0, (desiredN – currentN) * area); const pNeeded = Math.max(0, (desiredP – currentP) * area); const kNeeded = Math.max(0, (desiredK – currentK) * area); // Get fertilizer type const selectedFertilizer = fertilizerType.value; let nPerc, pPerc, kPerc; if (selectedFertilizer === ‘custom’) { nPerc = parseFloat(document.getElementById(‘custom-n’).value) || 0; pPerc = parseFloat(document.getElementById(‘custom-p’).value) || 0; kPerc = parseFloat(document.getElementById(‘custom-k’).value) || 0; } else { // Parse the N-P-K ratio from the selected option const ratios = selectedFertilizer.split(‘-‘); nPerc = parseFloat(ratios[0]); pPerc = parseFloat(ratios[1]); kPerc = parseFloat(ratios[2]); } // Calculate fertilizer amounts let fertilizerN = 0, fertilizerP = 0, fertilizerK = 0; let totalFertilizer = 0; if (nPerc > 0) { fertilizerN = (nNeeded / (nPerc / 100)); } if (pPerc > 0) { fertilizerP = (pNeeded / (pPerc / 100)); } if (kPerc > 0) { fertilizerK = (kNeeded / (kPerc / 100)); } // The total fertilizer needed is the maximum of the three calculations // because a single fertilizer product contains all three nutrients totalFertilizer = Math.max(fertilizerN, fertilizerP, fertilizerK); // If using a custom blend with zero for one nutrient, we need to handle that case if (selectedFertilizer === ‘custom’) { if (nPerc === 0 && pPerc === 0 && kPerc === 0) { totalFertilizer = 0; } else { // For custom blends, we might want to sum the separate requirements // This is a more advanced calculation that might need adjustment totalFertilizer = 0; if (nPerc > 0) totalFertilizer += fertilizerN; if (pPerc > 0) totalFertilizer += fertilizerP; if (kPerc > 0) totalFertilizer += fertilizerK; } } // Calculate number of 50lb bags const bagsNeeded = Math.ceil(totalFertilizer / 50); // Display results document.getElementById(‘result-n’).textContent = nNeeded.toFixed(1) + ‘ lbs’; document.getElementById(‘result-p’).textContent = pNeeded.toFixed(1) + ‘ lbs’; document.getElementById(‘result-k’).textContent = kNeeded.toFixed(1) + ‘ lbs’; document.getElementById(‘result-total’).textContent = totalFertilizer.toFixed(1) + ‘ lbs’; document.getElementById(‘result-bags’).textContent = bagsNeeded; // Generate recommendation let recommendation = ”; if (totalFertilizer === 0) { recommendation = ‘Your soil test shows adequate nutrient levels. No additional fertilizer is recommended at this time.’; } else { recommendation = `Based on your inputs, we recommend applying ${totalFertilizer.toFixed(1)} pounds of ${nPerc}-${pPerc}-${kPerc} fertilizer `; recommendation += `to your ${area} acre field. This will require approximately ${bagsNeeded} 50-pound bags. `; if (nNeeded > pNeeded && nNeeded > kNeeded) { recommendation += ‘Your field shows the greatest need for nitrogen.’; } else if (pNeeded > nNeeded && pNeeded > kNeeded) { recommendation += ‘Your field shows the greatest need for phosphorus.’; } else if (kNeeded > nNeeded && kNeeded > pNeeded) { recommendation += ‘Your field shows the greatest need for potassium.’; } else { recommendation += ‘Your field shows balanced nutrient needs.’; } } document.getElementById(‘recommendation-text’).textContent = recommendation; document.getElementById(‘results’).style.display = ‘block’; // Scroll to results document.getElementById(‘results’).scrollIntoView({ behavior: ‘smooth’ }); } // Animate elements when they come into view const animateOnScroll = function() { const elements = document.querySelectorAll(‘.feature-card, .testimonial-card’); elements.forEach(element => { const elementPosition = element.getBoundingClientRect().top; const windowHeight = window.innerHeight; if (elementPosition < windowHeight - 100) { element.classList.add('fade-in-up'); } }); }; window.addEventListener('scroll', animateOnScroll); animateOnScroll(); // Run once on page load });
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