Gewas Reflectie Sensoren Voor On-The-Go Variabel Doseren & Karteren

Gewas Reflectie Sensoren Voor On-The-Go Variabel Doseren & Karteren

Relatie tussen Zon en Plant

Celstructuur en Reflectie

Celstructuur en Reflectie Bare Soil VISIBLE Reflectance Controlled by Leaf Pigments NEAR-INFRARED Reflectance Controlled by Cell Structure

Remote Sensing

Gebruikt Rood & NIR Infrarood Weergave NDVI - Biomassa Dag en nacht inzetbaar Geen invloed van wolken en zon GreenSeeker Sensor

Sensor Field of View (FOV)

Basis GreenSeeker RT200 Systeem

GreenSeeker Sensors kijken recht naar beneden over rij/gewas. NDVI waardes varieren gebaseerd op grootte en kleur van het gewas.

Wat de sensor leest 0.35 NDVI ~ 50 cm mais. 0.50 NDVI ~ 75 cm mais. 0.58 NDVI ~ 100 cm mais. 0.66 NDVI ~ 125 cm mais.

Applicatie grafiek 0.35 0.50 0.58 0.66

Display geeft waardes weer en logt data. 0.58 11.0 11.6 Rate 11.6 Rate Cal 11.0

Nitrogen Fertilizer Rates: Not an easy target Rethinking Nitrogen, by Liz Morrison, The Corn and Soybean Digest, Jan 2007 New Univ. of Minn. nitrogen recommendations with soil scientists George Rehm and John Lamb. The new recommendations evolved from two decades of N-response trials across a wide range of production environments in seven Corn Belt states. The field trials were conducted on non-irrigated sites using either spring preplant or sidedress N application. Data were gathered for both corn following corn (CC) and corn following soybeans (SC). In a surprising finding, these experiments showed no relationship between optimum corn yields and the amount of N needed to produce those yields, Rehm says. Experiments in Minnesota, for example, found that in continuous corn, it took from 0 to 160 lbs. of N/acre to grow 150-bu. corn. Similar variation was seen across the Corn Belt. In other words, high corn yields don't indicate high N need.

Nitrogen Fertilizer Rates- Not an easy target. Rethinking Nitrogen, (Cont.) The answer: The soil supplies unpredictable amounts of N. Plantavailable N varies widely from year to year and field to field, depending on factors such as organic matter, crop rotations, drainage, tillage and weather. Productive soils can supply a tremendous amount of N, Rehm says. The environmental conditions that contribute to high yields also help release N from soil organic matter. Without adding any N, corn yields throughout the Corn Belt average about 55% of optimum in continuous corn and about 70% in a soybean-corn rotation, he says..

Yield (Bu/Acre) Nitrogen Fertilizer Rates- Not an easy target. 180 University of Nebraska, Irrigated Corn Study 1969-1983 160 140 120 100 80 60 40 20 0 1969 1971 1973 1975 1977 1979 1981 1983 0# 270# Year

Nitrogen Fertilizer Rates- Not an easy target. 200 180 160 Maximum Realized Yield Trend Line (Yield Goal) 140 120 100 80 60 40 20 0 Should we fertilize for maximum trend line yield every year? Actual Realized Yield 1940 1950 1960 1970 1980 1990 2000 2010 2020

Stikstofvenster Wij hebben genoeg N om ons potentieel te bereiken, en laat ons vertellen hoe groot wij worden. Als zij met meer N groter worden, dan kunnen wij dat ook!

Stikstofvenster lezen

Gewas Algoritmes en Applicatie Grafiek

GreenSeeker NDVI Map High Vigor Low Vigor

GreenSeeker Stikstof Toedienings Kaart Low Rate High Rate

GreenSeeker Uitgevoerde Bewerking Kaart Low Rate High Rate

Opbrengst Kaart Highest yield consistent with NDVI map. Improved yield from high rates

Samengestelde Grafiek

NDVI Kaart van 22 Hectare Katoen GreenSeeker : 9-28-05 ~ 22 Hectare

Vergelijking met Vliegtuigopname GreenSeeker : 9-28-05 Aerial Image: 9-6-05 ~ 40 Acres 2 Meter Aerial Image

RT200 Kaarten Application: 9-27-05 GreenSeeker Hoge vitaliteit ~ 80 Acres Lage vitaliteit Toe te dienen Toegediend

RT200

RT 220

GreenSeeker Resultaten: Tarwe en Mais Tarwe Gemiddelde extra financiele opbrengst; 19 per hectare Extra financiele opbrengst in de vorm van minder kunstmest of meer kunstmest en meer opbrengst! Deze cijfers zijn zeer afhankelijk van de gehanteerde prijzen! *Urean / 100 ltr Tarwe / 1000 kg Jan. 2009 32,- Jan. 2009 140,- Dec. 2009 15,50 Dec. 2009 119,50

GreenSeeker Resultaten in Tarwe Praktijkvoorbeeld, Dahlen Oost-Duitsland 3000 HA April 2009 2 e gift. Normale afgifte 217 KG KAS Greenseeker 162-217 KG Gemiddelde afgifte 187 KG Besparing 30 KG 30 KG 0,35* 10,50/HA Totale besparing seizoen 2009 200 TON!!!!!!! *Marktprijs Februari 2009

GreenSeeker

GreenSeeker

Variabel klappen-spuiten

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