A row unit with a harvesting head yield monitor, wherein the row unit comprises a row unit gearbox, first and second row unit arms (308, 310) coupled to the row unit gearbox and extending forward therefrom, first and second deck plates (312, 314) supported on top of the first and second row unit arms (308, 310), respectively, and first and second gathering chains (316, 318) disposed on top of the first and second row unit arms (308, 310), the row unit comprising: a first row unit cover disposed above the first gathering chain (316, 318) and the first deck plate (312, 314), wherein the first row unit cover comprises a first hollow plastic body; a second row unit cover disposed above the second gathering chain (316, 318) and the second deck plate (312, 314) wherein the second row unit cover comprises a second hollow plastic body; wherein the yield monitor comprises: a first sensing element; a driver circuit electrically coupled to the first sensing element and configured to drive the first sensing element to transmit a high frequency radio signal; a second sensing element; and a signal conditioning circuit electrically coupled to the second sensing element and configured to receive the high-frequency radio signal from the second sensing element; characterized in that the first sensing element is disposed inside the first hollow plastic body immediately above the first gathering chain (316, 318) and the first deck plate (312, 314); and in that the second sensing element is disposed inside the second hollow plastic body immediately above the second gathering chain (316, 318) and the second deck plate (312, 314), and configured to receive the high-frequency radio signal. a first row unit cover disposed above the first gathering chain (316, 318) and the first deck plate (312, 314), wherein the first row unit cover comprises a first hollow plastic body; a second row unit cover disposed above the second gathering chain (316, 318) and the second deck plate (312, 314) wherein the second row unit cover comprises a second hollow plastic body; wherein the yield monitor comprises: a first sensing element; a driver circuit electrically coupled to the first sensing element and configured to drive the first sensing element to transmit a high frequency radio signal; a second sensing element; and a signal conditioning circuit electrically coupled to the second sensing element and configured to receive the high-frequency radio signal from the second sensing element; characterized in that the first sensing element is disposed inside the first hollow plastic body immediately above the first gathering chain (316, 318) and the first deck plate (312, 314); and in that the second sensing element is disposed inside the second hollow plastic body immediately above the second gathering chain (316, 318) and the second deck plate (312, 314), and configured to receive the high-frequency radio signal. a first sensing element; a driver circuit electrically coupled to the first sensing element and configured to drive the first sensing element to transmit a high frequency radio signal; a second sensing element; and a signal conditioning circuit electrically coupled to the second sensing element and configured to receive the high-frequency radio signal from the second sensing element; characterized in that