HarvestLab™ 3000 continuously measures nutrients during the application at more than 4000 times per second. This allows for tracking of nutrient variations between different storage locations as well as differences within individual tank loads. This data is then used to control application amounts as well as the creation of as applied documentation for each nutrient across the field. With John Deere Manure Constituent Sensing, ingredients can be applied based on a target rate for one nutrient and a limit rate for a second ingredient (i.e., target rate for N, limit rate for P).

HarvestLab 3000 utilizing near-infrared sensor (NIR) technology paired with John Deere Manure Constituent Sensing will record manure nutrient levels for total nitrogen (N), ammonium-N (NH4), phosphate (P), potassium (K) and dry matter. Tests have shown that liquid manure can be highly variable for nitrogen (N), phosphate (P) and potassium (K) between different loads with a variance factor of 4-6 for nitrogen, a factor of 10 for dry matter and a factor of 25 for phosphate.

John Deere Manure Constituent Sensing enables significant improvements in accuracy of information and application of liquid manure nutrients as compared to taking a limited number of samples per storage location or transport vehicle. The John Deere HarvestLab 3000 sensor and the respective calibration curve have been developed to deliver a higher degree of accuracy as compared to limited random samples sent to commercial labs. The NIR sensor with manure calibrations has been benchmarked against both commonly used analysis methods in laboratories (wet chemical) and NIRS lab analysis. The results indicate that the relative error for HarvestLab 3000 Manure Constituent Sensing is in the range for samples analyzed using wet chemical laboratory tests.

Ingredients/constituents which can be measured with John Deere Manure Sensing:

	Ingredients/constituents
	Dry Matter (DM)*	Total N	P₂O₅	K₂O	NH₄	Volume	Flow rate
Ingredient	X	X	X	X	X	---	X
Unit send from HarvestLab 3000 sensor	Percent	lb/acre	lb/acre	lb/acre	lb/acre	---	---
Unit displayed when recording is enabled	Percent	lb/acre	lb/acre	lb/acre	lb/acre	gal./ac	gpm
Unit used for the GreenStar™ 3 2630/4600 CommandCenter™ /4640 Universal Display documentation	Percent	lb/acre	lb/acre	lb/acre	lb/acre	gal./ac	gpm

* within a DM range of 2.5 – 10 percent