This calculator helps you determine the ideal seed rate for your crops based on various factors. Understanding the correct seed rate is crucial for optimal plant population, yield, and resource utilization.
.seed-rate-calculator-wrapper {
font-family: sans-serif;
max-width: 500px;
margin: 20px auto;
padding: 20px;
border: 1px solid #ccc;
border-radius: 8px;
background-color: #f9f9f9;
}
.seed-rate-calculator-wrapper h2 {
text-align: center;
margin-bottom: 15px;
color: #333;
}
.seed-rate-calculator-wrapper p {
text-align: justify;
margin-bottom: 20px;
line-height: 1.6;
color: #555;
}
.calculator-inputs {
display: grid;
grid-template-columns: 1fr;
gap: 15px;
}
.input-group {
display: flex;
flex-direction: column;
}
.input-group label {
margin-bottom: 5px;
font-weight: bold;
color: #444;
}
.input-group input[type="number"] {
padding: 10px;
border: 1px solid #ddd;
border-radius: 4px;
font-size: 1rem;
box-sizing: border-box;
}
.calculator-inputs input::placeholder {
color: #aaa;
}
.seed-rate-calculator-wrapper button {
display: block;
width: 100%;
padding: 12px 15px;
background-color: #4CAF50;
color: white;
border: none;
border-radius: 5px;
font-size: 1.1rem;
cursor: pointer;
margin-top: 20px;
transition: background-color 0.3s ease;
}
.seed-rate-calculator-wrapper button:hover {
background-color: #45a049;
}
.calculator-result {
margin-top: 25px;
padding: 15px;
background-color: #e0f7e0;
border: 1px solid #c8e6c9;
border-radius: 5px;
text-align: center;
font-size: 1.2rem;
color: #2e7d32;
font-weight: bold;
}
.calculator-result strong {
color: #1b5e20;
}
function calculateSeedRate() {
var seedWeight = parseFloat(document.getElementById("seedWeight").value);
var germinationRate = parseFloat(document.getElementById("germinationRate").value);
var desiredStand = parseFloat(document.getElementById("desiredStand").value);
var landArea = parseFloat(document.getElementById("landArea").value);
var thousandSeedWeightActual = parseFloat(document.getElementById("thousandSeedWeightActual").value);
var resultElement = document.getElementById("result");
resultElement.innerHTML = ""; // Clear previous results
if (isNaN(seedWeight) || isNaN(germinationRate) || isNaN(desiredStand) || isNaN(landArea) || isNaN(thousandSeedWeightActual)) {
resultElement.innerHTML = "Please enter valid numbers for all fields.";
return;
}
if (germinationRate 100) {
resultElement.innerHTML = "Germination rate must be between 1 and 100.";
return;
}
if (seedWeight <= 0 || desiredStand <= 0 || landArea <= 0 || thousandSeedWeightActual <= 0) {
resultElement.innerHTML = "Input values for weights, stand, and area must be positive.";
return;
}
// Calculation steps:
// 1. Calculate the number of seeds needed per square meter, accounting for germination rate.
// Number of seeds per sq meter = Desired Plant Stand / (Germination Rate / 100)
var seedsPerSqMeter = desiredStand / (germinationRate / 100);
// 2. Calculate the total number of seeds needed for the entire area.
// Total Seeds = Seeds per sq meter * Land Area
var totalSeedsNeeded = seedsPerSqMeter * landArea;
// 3. Calculate the total weight of seeds needed in grams, using the actual thousand seed weight.
// Total Weight (grams) = (Total Seeds Needed / 1000) * Actual Thousand Seed Weight (grams)
var totalWeightGrams = (totalSeedsNeeded / 1000) * thousandSeedWeightActual;
// 4. Convert total weight to kilograms for practical application.
var totalWeightKg = totalWeightGrams / 1000;
// 5. Calculate the required seed rate in kg per hectare (assuming 1 hectare = 10,000 sq meters).
// Weight per hectare (kg) = Total Weight (kg) * (10000 / Land Area in sq meters)
var seedRateKgPerHectare = totalWeightKg * (10000 / landArea);
resultElement.innerHTML = "Recommended Seed Rate: " + seedRateKgPerHectare.toFixed(2) + " kg/hectare";
}